DTMF not passed to Call-Forwarding Number

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dcitelecom

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Oct 20, 2021
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This is a major issue for us. Please help if you can. Thanks in advance.

We have a toll-free DID on our system that is forwarded to an external local number which is a company PBX system. When people call, they are prompted to press 1 for English and 2 for French etc... but any digits entered are not passed to the company PBX. Instead, fusionpbx intercepts the digits and says "press # if you are finished". It seems to be looking for an extension and I am guessing it has something to do with the bind_digit settings but I have no idea how to fix it.
 
so I was tinkering around with the settings and now the situation has changed a bit. I call an extension on my system and the call is forwarded to an external IVR. I enter the requested digits and no DTMF is transmitted. Also, no message at all from fusionpbx. DTMF are not transferred from leg A to leg B (the forwarded number).
 
Can anyone check if this is supposed to work? You can duplicate my issue by forwarding an inbound call to a company IVR or answering machine and then attempt to navigate the IVR. In my case, the call forward destination (b-leg) does not receive any digits. Unfortunately, if I can't fix this I will have to give up on FusionPBX.
 
Does anything show in the logs? The only thing I can suggest is trying <param name="pass-rfc2833" value="true"/> on the external profile, this disabled the de-encode re-encode of DTMF in the event the two legs have different methods.
 
Thanks. So DIDww has an option called "telephone-event" in the available codec section and if that is not enabled the dtmf dont work properly. I only had alaw and ulaw enabled. That was the problem of not getting any dtmf at all.
 
Oh shit, yeh. Very important 'codec'. Weird they let you disable it without a fat warning.
 
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